Question

You are given samples of the elements bromine, chlorine and iodine, each labels A,B, and C. At room temperature (20°C) sample A is solid, sample B is liquid and sample C is gas. What are the identities of these 3 samples?

Answer 1

Given the samples' physical states at room temperature, Sample A (solid) is iodine, Sample B (liquid) is bromine, and Sample C (gas) is chlorine, due to the distinct physical properties of halogens.

Step-by-step explanation:

To determine the identities of samples A, B, and C, we must consider the physical properties of halogens at room temperature. The given information states that Sample A is solid, Sample B is liquid and Sample C is gas at room temperature. Knowing the room temperature states of halogens, we can match these to iodine, bromine, and chlorine respectively. Here's why:

• Iodine is a dark purple-gray solid at room temperature.
• Bromine is a dark orange liquid with a high vapor pressure, noticeable by its reddish vapor.
• Chlorine is a greenish-yellow gas, lighter than bromine and iodine, and thus exists as a gas at room temperature.

Therefore, Sample A which is solid at room temperature must be iodine, Sample B which is liquid must be bromine, and Sample C which is a gas must be chlorine.

Answer 2

it is c i hope it helped you